--- old/src/share/vm/memory/sharedHeap.cpp	2015-03-16 10:54:35.250894766 +0100
+++ new/src/share/vm/memory/sharedHeap.cpp	2015-03-16 10:54:35.146890481 +0100
@@ -32,7 +32,6 @@
 #include "runtime/atomic.inline.hpp"
 #include "runtime/fprofiler.hpp"
 #include "runtime/java.hpp"
-#include "services/management.hpp"
 #include "utilities/copy.hpp"
 #include "utilities/workgroup.hpp"
 
@@ -40,31 +39,12 @@
 
 SharedHeap* SharedHeap::_sh;
 
-// The set of potentially parallel tasks in root scanning.
-enum SH_process_roots_tasks {
-  SH_PS_Universe_oops_do,
-  SH_PS_JNIHandles_oops_do,
-  SH_PS_ObjectSynchronizer_oops_do,
-  SH_PS_FlatProfiler_oops_do,
-  SH_PS_Management_oops_do,
-  SH_PS_SystemDictionary_oops_do,
-  SH_PS_ClassLoaderDataGraph_oops_do,
-  SH_PS_jvmti_oops_do,
-  SH_PS_CodeCache_oops_do,
-  // Leave this one last.
-  SH_PS_NumElements
-};
-
 SharedHeap::SharedHeap(CollectorPolicy* policy_) :
   CollectedHeap(),
   _collector_policy(policy_),
   _strong_roots_parity(0),
-  _process_strong_tasks(new SubTasksDone(SH_PS_NumElements)),
   _workers(NULL)
 {
-  if (_process_strong_tasks == NULL || !_process_strong_tasks->valid()) {
-    vm_exit_during_initialization("Failed necessary allocation.");
-  }
   _sh = this;  // ch is static, should be set only once.
   if (UseConcMarkSweepGC || UseG1GC) {
     _workers = new FlexibleWorkGang("GC Thread", ParallelGCThreads,
@@ -78,14 +58,6 @@
   }
 }
 
-int SharedHeap::n_termination() {
-  return _process_strong_tasks->n_threads();
-}
-
-void SharedHeap::set_n_termination(int t) {
-  _process_strong_tasks->set_n_threads(t);
-}
-
 bool SharedHeap::heap_lock_held_for_gc() {
   Thread* t = Thread::current();
   return    Heap_lock->owned_by_self()
@@ -96,20 +68,8 @@
 void SharedHeap::set_par_threads(uint t) {
   assert(t == 0 || !UseSerialGC, "Cannot have parallel threads");
   _n_par_threads = t;
-  _process_strong_tasks->set_n_threads(t);
 }
 
-#ifdef ASSERT
-class AssertNonScavengableClosure: public OopClosure {
-public:
-  virtual void do_oop(oop* p) {
-    assert(!Universe::heap()->is_in_partial_collection(*p),
-      "Referent should not be scavengable.");  }
-  virtual void do_oop(narrowOop* p) { ShouldNotReachHere(); }
-};
-static AssertNonScavengableClosure assert_is_non_scavengable_closure;
-#endif
-
 void SharedHeap::change_strong_roots_parity() {
   // Also set the new collection parity.
   assert(_strong_roots_parity >= 0 && _strong_roots_parity <= 2,
@@ -130,104 +90,6 @@
   }
 }
 
-void SharedHeap::process_roots(bool activate_scope,
-                               ScanningOption so,
-                               OopClosure* strong_roots,
-                               OopClosure* weak_roots,
-                               CLDClosure* strong_cld_closure,
-                               CLDClosure* weak_cld_closure,
-                               CodeBlobClosure* code_roots) {
-  StrongRootsScope srs(this, activate_scope);
-
-  // General roots.
-  assert(_strong_roots_parity != 0, "must have called prologue code");
-  assert(code_roots != NULL, "code root closure should always be set");
-  // _n_termination for _process_strong_tasks should be set up stream
-  // in a method not running in a GC worker.  Otherwise the GC worker
-  // could be trying to change the termination condition while the task
-  // is executing in another GC worker.
-
-  // Iterating over the CLDG and the Threads are done early to allow G1 to
-  // first process the strong CLDs and nmethods and then, after a barrier,
-  // let the thread process the weak CLDs and nmethods.
-
-  if (!_process_strong_tasks->is_task_claimed(SH_PS_ClassLoaderDataGraph_oops_do)) {
-    ClassLoaderDataGraph::roots_cld_do(strong_cld_closure, weak_cld_closure);
-  }
-
-  // Some CLDs contained in the thread frames should be considered strong.
-  // Don't process them if they will be processed during the ClassLoaderDataGraph phase.
-  CLDClosure* roots_from_clds_p = (strong_cld_closure != weak_cld_closure) ? strong_cld_closure : NULL;
-  // Only process code roots from thread stacks if we aren't visiting the entire CodeCache anyway
-  CodeBlobClosure* roots_from_code_p = (so & SO_AllCodeCache) ? NULL : code_roots;
-
-  Threads::possibly_parallel_oops_do(strong_roots, roots_from_clds_p, roots_from_code_p);
-
-  if (!_process_strong_tasks->is_task_claimed(SH_PS_Universe_oops_do)) {
-    Universe::oops_do(strong_roots);
-  }
-  // Global (strong) JNI handles
-  if (!_process_strong_tasks->is_task_claimed(SH_PS_JNIHandles_oops_do))
-    JNIHandles::oops_do(strong_roots);
-
-  if (!_process_strong_tasks-> is_task_claimed(SH_PS_ObjectSynchronizer_oops_do))
-    ObjectSynchronizer::oops_do(strong_roots);
-  if (!_process_strong_tasks->is_task_claimed(SH_PS_FlatProfiler_oops_do))
-    FlatProfiler::oops_do(strong_roots);
-  if (!_process_strong_tasks->is_task_claimed(SH_PS_Management_oops_do))
-    Management::oops_do(strong_roots);
-  if (!_process_strong_tasks->is_task_claimed(SH_PS_jvmti_oops_do))
-    JvmtiExport::oops_do(strong_roots);
-
-  if (!_process_strong_tasks->is_task_claimed(SH_PS_SystemDictionary_oops_do)) {
-    SystemDictionary::roots_oops_do(strong_roots, weak_roots);
-  }
-
-  // All threads execute the following. A specific chunk of buckets
-  // from the StringTable are the individual tasks.
-  if (weak_roots != NULL) {
-    if (CollectedHeap::use_parallel_gc_threads()) {
-      StringTable::possibly_parallel_oops_do(weak_roots);
-    } else {
-      StringTable::oops_do(weak_roots);
-    }
-  }
-
-  if (!_process_strong_tasks->is_task_claimed(SH_PS_CodeCache_oops_do)) {
-    if (so & SO_ScavengeCodeCache) {
-      assert(code_roots != NULL, "must supply closure for code cache");
-
-      // We only visit parts of the CodeCache when scavenging.
-      CodeCache::scavenge_root_nmethods_do(code_roots);
-    }
-    if (so & SO_AllCodeCache) {
-      assert(code_roots != NULL, "must supply closure for code cache");
-
-      // CMSCollector uses this to do intermediate-strength collections.
-      // We scan the entire code cache, since CodeCache::do_unloading is not called.
-      CodeCache::blobs_do(code_roots);
-    }
-    // Verify that the code cache contents are not subject to
-    // movement by a scavenging collection.
-    DEBUG_ONLY(CodeBlobToOopClosure assert_code_is_non_scavengable(&assert_is_non_scavengable_closure, !CodeBlobToOopClosure::FixRelocations));
-    DEBUG_ONLY(CodeCache::asserted_non_scavengable_nmethods_do(&assert_code_is_non_scavengable));
-  }
-
-  _process_strong_tasks->all_tasks_completed();
-}
-
-
-class AlwaysTrueClosure: public BoolObjectClosure {
-public:
-  bool do_object_b(oop p) { return true; }
-};
-static AlwaysTrueClosure always_true;
-
-void SharedHeap::process_weak_roots(OopClosure* root_closure) {
-  // Global (weak) JNI handles
-  JNIHandles::weak_oops_do(&always_true, root_closure);
-}
-
 void SharedHeap::set_barrier_set(BarrierSet* bs) {
   _barrier_set = bs;
   // Cached barrier set for fast access in oops